The influence of fascicle behavior on the lack of velocity dependence in eccentric joint torque in humans: in Vivo observation

Kentaro Chino*, Naotoshi Mitsukawa, Kai Kobayashi, Yusuke Miyoshi, Toshiaki Oda, Hiroaki Kanehisa, Tetsuo Fukunaga, Senshi Fukashiro, Yasuo Kawakami

*この研究の対応する著者

研究成果: Article査読

9 被引用数 (Scopus)

抄録

To investigate the relationship between fascicle behavior and joint torque, the fascicle behavior of the triceps surae during isometric and eccentric (30 and 60 deg/s) plantar flexion by maximal voluntary and submaximal electrical activation (MVA and SEA) was measured by real-time ultrasonography. Eccentric torque at 30 and 60 deg/s was significantly higher than isometric torque under SEA, but not under MVA. However, fascicle length did not significantly differ between isometric and eccentric trials under either condition. Therefore, the difference in developed torque by MVA and SEA cannot be explained by fascicle behavior. Under both MVA and SEA conditions, eccentric torque at 30 and 60 deg/s was equivalent. Similarly, fascicle lengthening velocities at 30 and 60deg/s did not show any significant difference. Such fascicle behavior can be attributed to the influence of tendinous tissue and pennation angle, and lead to a lack of increase in eccentric torque with increasing angular velocity.

本文言語English
ページ(範囲)111-118
ページ数8
ジャーナルJournal of Applied Biomechanics
25
2
DOI
出版ステータスPublished - 2009 5

ASJC Scopus subject areas

  • 生物理学
  • 整形外科およびスポーツ医学
  • リハビリテーション

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